26201215 has 4 divisors (see below), whose sum is σ = 31441464. Its totient is φ = 20960968.

The previous prime is 26201213. The next prime is 26201237. The reversal of 26201215 is 51210262.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26201215 - 2¹ = 26201213 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 26201192 and 26201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26201213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620117 + ... + 2620126.

It is an arithmetic number, because the mean of its divisors is an integer number (7860366).

Almost surely, 2^26201215 is an apocalyptic number.

26201215 is a deficient number, since it is larger than the sum of its proper divisors (5240249).

26201215 is an equidigital number, since it uses as much as digits as its factorization.

26201215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240248.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 26201215 is about 5118.7122403980. The cubic root of 26201215 is about 297.0118728414.

Adding to 26201215 its reverse (51210262), we get a palindrome (77411477).

The spelling of 26201215 in words is "twenty-six million, two hundred one thousand, two hundred fifteen".